USD245173SExpiredUtility

Solar heat exchange element

33
Assignee: VAN LEEUWEN EGONPriority: Oct 30, 1975Filed: Oct 30, 1975Granted: Jul 26, 1977
Est. expiryOct 30, 1995(expired)· nominal 20-yr term from priority
Inventors:Egon Van Leeuwen
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PatentIndex Score
3
Cited by
1
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for solar heat exchange element, as shown.

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